Dyspnea can cause chest tightness and shortness of breath due to many reasons, such as angina, asthma, chronic obstructive pulmonary disease, etc., need to be in the doctor’s guidance on the cause of the medication. 1. Angina: It is recommended to take nitroglycerin to dilate the coronary arteries to reduce myocardial oxygen consumption, so as to relieve myocardial ischemia; metoprolol can slow down the heart rate to reduce myocardial oxygen consumption; nifedipine can reduce myocardial oxygen consumption and dilate the blood vessels to effectively relieve the symptoms of cardiac discomfort. 2. Asthma: asthma can be relieved by the use of albuterol, aminophylline and other drugs to quickly relieve bronchial spasm and relieve symptoms. 3. Chronic Obstructive Pulmonary Disease (COPD): bronchial dilatation through the use of drugs such as terbutaline, ipratropium bromide, salmeterol, etc. can effectively reduce discomfort and improve symptoms. But generally choose more inhaled preparations. There may be other causes of dyspnea chest tightness and shortness of breath, such as heart failure and pulmonary embolism. Due to the complexity of the etiology and individual differences, the drug does not exist absolute safety and effectiveness, so the drug needs to be used in strict compliance with the doctor’s instructions, the emergence of adverse reactions to timely consultation, drug allergy is prohibited.